Almost any thermostat out there will control multiple heat sources, but if you are talking about independent control - ie cage 1 at 90, cage 2 at 84 etc. - then as mentioned you would need a Herpstat 4.

Otherwise, you can use almost any t-stat. I recommend the Johnson or Ranco at the lower end and the Herpstats at the higher. I've used both for many years and they're great.